I am trying to decide if I should install a main power switch in my boat. Would I be better off with a mechanical "break" type switch in the battery compartment or a electrical switch up on the console. Also which battery (ies) do you run all of your accessories off of? Thanks

I have a "main power" switch on my boat.  The only thing it shuts down are the lights, and the electronics.  If you want to shut down the power to everything, then you're going to need a heavy duty battery disconnect selector switch, maybe two.  You'll need a switch for the cranking battery, and another for the trolling motor circuit.  You'll need a switch with the capacity to handle the maximum draw for the cranking battery, and the trolling motor battery or batteries.  You only need a single switch for the trolling motor power source whether you have a 12, 24, or 36 volt trolling motor.

 

That switch should be located between the trolling motor and the battery on the positive cable, if memory serves.

That switch should be located between the trolling motor and the battery on the positive cable, if memory serves.

 

I have one on my boat.  That is correct about placement.  Put it in a convenient location, or you won't use it. You'll want it close to the batteries, rather run some fairly heavy gauge wire all over your boat.

I have one on my console that shuts off all accessories like pumps, sonars lights etc. And one in the bilge that shuts off my jackplate and power poles.